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Welcome to Dr. Chu’s

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Today’s

Today’s topic is …

Gases: Ideal Gas Law

Dr. Chu

River Dell Regional High School

IDEAL GASES Gas molecules are far apart so the

volume each gas molecule occupies is negligible compared to the volume the gas occupies.

Gas molecules do not interact with each other.

All collisions between gas molecules and walls of the container are elastic, meaning no energy loss in the form of heat during collision.

IDEAL GAS LAW

IDEAL GAS LAW

IDEAL GAS LAW

IDEAL GAS LAW - EXAMPLE For 4 moles of a gas at a pressure of 5.6

atm and a volume of 12 liters, what is the temperature?

IDEAL GAS LAW - EXAMPLE What volume would 32.0 g of NO2 gas

occupy at 3.12 atm and 18.0°C?

IDEAL GAS LAW - EXAMPLE Determine the density of CO2 at 745

mmHg and 65oC?

IDEAL GAS LAWS – EXERCISE At what temperature does 16.3 g of nitrogen gas

have a pressure of 1.25atm in a 25.0 L tank??

Calculate the molecular weight of a gas if 35.44 g of the gas stored in a 7.50 L tank that exerts a pressure of 60.0 atm at a constant temperature of 35.5°C.

An unknown gas has a density of 3.167 g/L at STP. What is the identity of the gas? (Ar, O2, Cl2, HF, H2O)?

IDEAL GAS LAWS – EXERCISE (ANSWERS) At what temperature does 16.3 g of nitrogen gas

have a pressure of 1.25atm in a 25.0 L tank??

Calculate the molecular weight of a gas if 35.44 g of the gas stored in a 7.50 L tank that exerts a pressure of 60.0 atm at a constant temperature of 35.5°C.

An unknown gas has a density of 3.167 g/L at STP. What is the identity of the gas? (Ar, O2, Cl2, HF, H2O)?